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Original Article

Estimating Gallstone Incidence from Prevalence Data

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Pages 984-986 | Received 07 Apr 1992, Accepted 09 Jun 1992, Published online: 08 Jul 2009
 

Abstract

Because incidence data for gallstones are generally unavailable, we have used a previously described epidemiologic method to estimate age-specific incidence rates from published gallstone prevalence data in seven populations. Yearly incidence rates ranged from a low of 1 in 1000 for the youngest men to 19 in 1000 for the oldest women. An overall pattern of increasing incidence of disease with increasing age was observed. Rate-ratios for oldest versus youngest subjects ranged from 4.0 in German women to 9.4 in Italian men: mean rate-ratio = 5.9; 95% CI = 4.0–7.8. For all centers, age-specific female incidence rates exceeded comparable age-specific male rates at all ages (mean female to male rate-ratio = 1.85; 95% CI = 1.7–2.0). No differences were observed in the sex-specific incidence of gallstones for subjects of similar age in the various centers (P = > 0.10). For Denmark our estimates resemble recently published incidence data obtained by re-surveying the original population.

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